React.js Developer

Experienced Frontend Engineer (React, Next.js, React Native)

Company: Speer Health Location: Remote / Hybrid Experience: 5+ years building production frontends with strong UX comprehension

Speer is a rapidly growing organization empowering life sciences with AI capabilities that elevate patient outcomes and spearhead new drug launches. We're looking for a front end engineer who is passionate about taking product ownership and being a team player.

What You’ll Do

• Build and own Speer’s user-facing applications across web and mobile.
• Develop high-quality, scalable interfaces using React, Next.js, and React Native.
• Implement complex, dynamic UI systems including dashboards, data visualizations, and workflow-driven experiences.
• Build responsive, accessible, and performance-optimized applications.
• Integrate animations and dynamic content (Lottie, motion systems, interactive components).
• Implement and maintain authentication and authorization flows across the frontend (SSO, OAuth, SAML, role-based access).
• Work closely with backend and infrastructure engineers to integrate APIs and real-time data systems.
• Partner with product and founders to translate medical insights workflows into intuitive experiences.
• Own frontend architecture, state management, and performance strategy.
• Establish UI engineering standards: component libraries, testing practices, and design system patterns.
• Continuously improve usability, reliability, and product experience through iteration and user feedback.
• Experience working with GraphQL APIs (queries, mutations, subscriptions, caching strategies).
• Familiarity with role-based access control (RBAC), preferably using authentication providers.
• Strong understanding of core design principles (layout, typography, spacing, visual hierarchy, accessibility).

What We’re Looking For

• Strong proficiency in modern JavaScript and TypeScript.
• Deep hands-on experience with React, Next.js, and React Native.
• Experience building complex, data-driven web applications.
• Strong understanding of frontend architecture, state management, and performance optimization.
• Experience implementing authentication flows including OAuth 2.0, SSO, and SAML-based integrations.
• Comfort working closely with APIs, backend teams, and product stakeholders.
• Product-oriented mindset — you care about UX, clarity, and solving real user problems.
• Ability to work autonomously, own features end-to-end, and ship production-quality work.
• Startup mentality: comfortable with ambiguity, fast iteration, and high ownership.
• Experience integrating GraphQL clients (Apollo, Relay, or similar) into production applications.
• Experience designing and enforcing fine-grained permission systems on the frontend.
• Ability to translate design systems and Figma specs into clean, reusable components.

Strong Bonus If You Have

• Experience building enterprise or SaaS platforms.
• Experience with animation systems (Lottie, Framer Motion, GSAP).
• Experience with data visualization libraries (Recharts, D3, Chart.js, etc.).
• Familiarity with mobile deployment pipelines (iOS/Android via React Native).
• Experience working with healthcare, life sciences, or regulated products.
• Experience collaborating closely with designers and shaping design systems.
• Exposure to accessibility standards (WCAG) and performance profiling.

Nice to Have

• Experience with design systems and component libraries.
• Familiarity with feature flagging, analytics, and A/B testing.
• Experience supporting AI-powered or real-time interfaces.
• Experience contributing to early-stage products or design-heavy startups.

LogiNext is looking for a technically savvy and experienced Engineering Leader to take up front-end development efforts. You will design and develop elegant interfaces that exceed client expectations in terms of value and benefit. You will collaborate on scalability issues involving visualizing massive amounts of data and information. You will identify, define and communicate best practices for front end.

You are passionate about building secure, high-performing and scalable front-end applications. Your design intuition inclines towards usability, elegance and simplicity. You are biased towards open-source tools and existing frameworks. You have demonstrated strong inter-personal and communication skills.

Responsibilities

• Lead and direct UI/UX team, define software architecture, collaborate with other teams to explore existing systems, determine areas of complexity and potential risks to successful implementation of advanced visualization products
• Define software architecture, collaborate with other teams to explore existing systems, determine areas of complexity and potential risks to successful implementation of advanced visualization products
• Translate wireframes into functional requirements, write well-abstracted, reusable, high-performance code for UI components
• Work closely with design, product management and development teams to create elegant, usable, responsive and interactive interfaces
• Contribute to continual improvement by suggesting improvements to user interface, software architecture or new technologies
• Optimize web applications to maximize speed and scale. Support diverse clients from high-powered desktop computers to low-end mobile devices
• Understand and coach/teach others, show a high level of ethics and team-work

 Requirements

• Bachelor/Master’s degree in Computer Science, Information Technology or a related field
• 10+ years of experience in developing responsive, elegant, efficient and cross-browser front-end applications
• Hands on experience on various MVC frameworks, UI libraries and tools such as Angular, ReactJS, HTML5, CSS3, D3.js
• Hands on experience on Map API’s like Google Maps, Openstreetmap and other powerful information-rich maps
• Familiar with UX processes and design
• Proven ability to drive large scale projects with deep understanding of Agile SDLC, high collaboration and leadership
• Excellent written and oral communication skills, judgment and decision making skills

Job Description:

We are looking for good JavaScript developers who are proficient with React.js. 

Responsibilities

• Developing new user-facing features using React.js.
• Have 2-4 years of experience.
• Building reusable components and front-end libraries for future use
• Translating designs and wireframes into high-quality code
• Optimizing components for maximum performance across a vast array of web-capable devices and browsers

Skills:

• Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model
• Thorough understanding of React.js and its core principles
• Experience with popular React.js workflows (such as Flux or Redux)
• Experience with data structure libraries (e.g., Immutable.js
• Familiarity with RESTful APIs
• Knowledge of modern authorization mechanisms, such as JSON Web Token
• Familiarity with modern front-end build pipelines and tools
• A knack for benchmarking and optimization

• Full stack product engineering i.e. design, engineer, test, deploy, monitor, and maintain software components to QA and Production environments
• Design & engineer product experience & APIs conforming to defined quality, maintainability, scalability, and performance KPIs
• Build, maintain, and improve continuous integration and delivery lifecycle processes
• Automation of repetitive engineering and production activities

• Engineering in computer science
• 3+ year of relevant experience in product engineering with expertise in building frameworks, reusable components, and APIs
• Expert level skills in analytical & problem solving
• Strong programming and engineering fundamentals like Data Structures,
• Design Principles, TDD, and Performance Tuning to build scalable and performance optimized product
• Ability to communicate clearly in English

• HTML5
• CSS3 (Sass/Less)
• JQuery
• JavaScript (ES6) / TypeScript
• React.js
• Version Control : Git

• Design and code features for the website application as per the specifications provided by the Product and Design teams.
• Ship features in fast-moving agile sprints.
• Work closely with Backend, Product Design, and Product Management teams to brainstorm and chalk out details of features.
• Ability to build a feature from scratch & drive it to completion

Must have:

• Good understanding of Javascript and Clean architecture.
• Good understanding of asynchronous programming, callback, and closures.
• Strong experience with Javascript frontend framework/libraries like ReactJS
• Understanding of stateless application
• Good knowledge of CSS and its pre-processors like SASS/LESS
• Good understanding of server-side templates.
• Experience with creating cross-browser compatible web apps
• Should be Strong in MySql / Postgres database.
• Stronghold in Data structure and processing JSON

Good to have

• Basic knowledge of CI, CD
• Intermediate knowledge in any cloud services(AWS, GCP)
• Familiar with testing frameworks like Mocha, Cypress